David Woodhouse wrote:
On Mon, 2007-06-18 at 01:24 +0200, Arnd Bergmann wrote:
On Monday 18 June 2007, Arjan van de Ven wrote:
On Sun, 2007-06-17 at 18:33 -0400, Mike Frysinger wrote:
This changes asm() to __asm__() and volatile to __volatile__ so that these
headers can be used with gcc's -std=c99.
hmm but the kernel doesn't use -std=c99...
The byteorder headers are exported to user space through
include/asm-generic/Kbuild.asm, and they are used by a number
of other exported headers, so they should work with any
gcc flags that a user might want to use.
Even those headers which are exported are _still_ kernel headers¹. The
'caveat emptor' principle still applies to them, and we don't have to be
_that_ anal about it. GNU extensions (and proper C types, for that
matter) should be acceptable, surely?
If we expect userspace apps to include them, then I would vote for no,
not for anything outside of #ifdef __KERNEL__ in exported headers. Keep
in mind also that C++ apps may need to include these as well and those
extensions don't always play well in C++ mode. (Last instance I ran into
was the ioctl argument checking macros _IOR, _IOW, etc. that create
non-compiling code if you use them in a C++ program.)
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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